<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>计算圆的面积</title>
</head>

<body>
  <script>
    // let radius = prompt('请输入圆的半径')
    // const mianji = 3.14 * radius * radius
    // document.write(mianji)
    let str = '11'
    let str1 = 11
    console.log(str, str1);

  </script>
</body>

</html>